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Shape‐Selective Synthesis of Palladium Nanoparticles Stabilized by Highly Branched Amphiphilic Polymers

Schlotterbeck, U., Aymonier, C., Thomann, R., Hofmeister, H., Tromp, M., Richtering, W. & Mecking, S., Oct-2004, In : Advanced Functional Materials. 14, 10, p. 999-1004 6 p.

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  • Shape‐Selective Synthesis of Palladium Nanoparticles Stabilized by Highly Branched Amphiphilic Polymers

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DOI

  • Ulf Schlotterbeck
  • Cyril Aymonier
  • Ralf Thomann
  • Herbert Hofmeister
  • Moniek Tromp
  • Walter Richtering
  • Stefan Mecking

Despite the current broad interest in such materials, the synthesis of defined structures in the size range of 10 nm to ca. 1 μm ("mesoscopic") is challenging. Few routes shape-selectively afford geometrically regular structures, other than the typical spherical metal particles of 1 to 10 nm. Moreover, these few routes are largely restricted to aqueous systems, however, for catalysis and other applications dispersions in organic solvents are desirable. Carbon monoxide reduction of a palkdium(II) compound in combination with stabilization by (readily available) amphiphilic hyperbranched polymers surprisingly affords dispersiohs of hexagonal platelets selectively with average sizes of thirty to several hundred nanometers in toluene. The size can be controlled by the polymer composition. Transmission electron microscopy (TEM), electron diffraction, and extended X-ray absorption fine structure (EXAFS) spectroscopy demonstrate these palladriurn(0) platelets to be extremely thin (1-2 nm), Despite this high aspect ratio, the platelets prove quite shear resistant.

Original languageEnglish
Pages (from-to)999-1004
Number of pages6
JournalAdvanced Functional Materials
Volume14
Issue number10
Publication statusPublished - Oct-2004
Externally publishedYes

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